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DeadEnd's avatar
DeadEnd
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2 years ago
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Question Regarding Clock Synchronization in EyeQ BER function

Hello, I have a question regarding Stratix. I am looking to measure BER using the EyeQ feature on Stratix. Here’s my question: when Stratix transmits and receives data for BER measurement, it synchr...
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  • Kshitij_Intel's avatar
    Kshitij_Intel
    2 years ago

    Hi,

    ​

    I understand, your confusion. My understanding is that from the statement i.e., "The transceivers do not support the XGMII interface to the MAC/RS as defined in the IEEE 802.3-2008 specification. Instead, they support a 64-bit data and 8-bit control SDR interface between the MAC/RS and the PCS." it is Single Data Rate Only but width of data and control word becomes double i.e., 64-bit and 8-bit Actually you achieves the same data rate.


    So, no need to sample at rising and falling edge for double data rate.


    Hope this clarifies.


    Thank you,

    Kshitij Goel


  • DeadEnd's avatar
    DeadEnd
    Icon for New Contributor rankNew Contributor
    2 years ago

    Thank you for your reply.

    But the contents you shared show that "The transceivers do not support the XGMII interface to the MAC/RS as defined in the IEEE 802.3-2008 specification. Instead, they support a 64-bit data and 8-bit control SDR interface between the MAC/RS and the PCS."

    Since BER uses transicever, doesn't that mean DDR is not supported?

    If not, I would be very grateful if you could tell me how to determine which protocol I used.